This standard specifies the test method for the protection of gold and gold alloy electroplated coatings for engineering, decoration and protection from residual salt contamination. This standard applies to metal parts; it does not apply to composite parts, such as parts with both plastic and plated metal. GB/T 12305.6-1997 Test methods for gold and gold alloy electroplated coatings on metal coatings Part 6: Determination of residual salts GB/T12305.6-1997 Standard download decompression password: www.bzxz.net
This standard specifies the test method for the protection of gold and gold alloy electroplated coatings for engineering, decoration and protection from residual salt contamination. This standard applies to metal parts; it does not apply to composite parts, such as parts with both plastic and plated metal.

GB/T 12305.6
This standard is based on ISC4524-6:1988% metal coatings - Test methods for gold and gold alloy electroplating - Part VI: Determination of residual salts. It is equivalent to the international standard in terms of technical content and is basically equivalent to it in terms of writing rules. This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metallic and Non-metallic Coatings. The drafting unit of this standard: Wuhan Institute of Materials Protection, Ministry of Machinery Industry. The main drafters of this standard: Jiang Xinhua,www.bzxz.net
:comGB/T12305.6—1997
ISO Foreword
ISO (International Organization for Standardization) is a worldwide joint organization of national standardization bodies (IS) member bodies. The work of formulating international standards is generally carried out through ISC technical committees. If each member body is interested in a topic determined by a technical committee, it has the right to ask the committee for comments. International organizations, both governmental and non-governmental, that have ties with ISO may also participate in the work. In all aspects of electrical standardization, ISO and the International Electrotechnical Commission (IEC) work closely together to develop international standards drafts by technical committees. Before the ISO Council adopts them as international standards, they are first sent to member groups for approval. According to ISO procedures, at least 75% of the member groups participating in the vote must agree to pass. International Standard TSO4524-6 was developed by ISO/TC1U7 Technical Committee on Metals and Other Inorganic Coatings. Users should note that all international standards are subject to revision. Unless otherwise specified, the other international standards cited here refer to the latest versions. IS) 4524, under the general standard "Metallic coverings - Test methods for gold and gold alloy electroplated coatings", lists the following parts: - Part 1: Measurement of short covering thickness; - Part 1, Environmental testing; - Part 2: Porosity resistance image test; - Part 4: Determination of gold content; - Part 5: Adhesion strength test; - Part 6, Determination of residual salt: - Part 7: Determination of single board resistivity. 1 Scope
National Standard of the People's Republic of China
Metallic coatings
Test methods for elerlrodeposiledgold and gold ailoy coatingsPart 6.Determination of the presence of resldual saltsGB/T 12305.6 - 1997
eqvIs04524-6:1988
This standard specifies the test method for the protection of gold and gold alloy electroplated coatings for engineering, decoration and protection from contamination by residual salts. This standard applies to metal parts: it does not apply to composite parts, such as parts with both plastic and plated metal. 2 Principle
The parts are boiled in water of known conductivity for a specified time, and the increase in conductivity caused by the precipitation of residual salts and other conductive impurities is measured.
3 Reagents
Water: conductivity not greater than 100uS/m at 20℃+1C. 4 Instruments
All glass instruments used are made of silicate glass and must meet the cleanliness requirements specified in 5.2 and be kept separately for this test.
4.1 Round bottom flask, capacity of 250ml., and equipped with a water reflux condenser. 4.2 Beaker: The size should be suitable for the test piece, marked with 100ml. scale, and equipped with appropriate devices to reduce excessive evaporation loss of water, such as cooling water cover.
4.3 Conductivity meter
5 Test method
5.1 Test specimen
Take one or more parts that are completely covered by coated metal. The total surface area is about 30cm. According to its size (see 5.3), test according to the provisions of 5.3.1 or 5.3.2. Be sure to avoid accidental contamination of the sample. During the inspection, bring clean contact parts with the cover. 5-2 Inspection of instrument clarity
Before the measurement, add 100ml of water (see Chapter 3) to the test container (see 4.1 or 4.2), then slowly boil it for 10min under the specified test conditions (see 5.3.1 and 5.3.2), cool the water to 20℃±1℃, and measure its conductivity with a conductivity meter (see 4.3). Approved by the State Administration of Technical Supervision on June 27, 1997 and implemented on January 1, 1998
GB/T 12305.6-1997
If the measured value exceeds 100μS/m, use another 100mL of water for re-measurement. If the measured value exceeds 100mS/m again, use a new container for re-testing.
Qualified glassware should be kept separately for this test. 5.3 Determination
5.3.1 Samples with a cross-sectional width or diameter less than 15mm and a length not greater than 40mm. After checking the cleanliness of the instrument (see 5.2), place the sample (see 5.1) in a round-bottom flask and add 100 mL of water (see Chapter 3). The conductivity of the water should be determined immediately before measurement. The water should be completely immersed in the test flask. Install a condenser on the flask and slowly boil it for 10 minutes. When the water cools to 20°C ± 1°C, measure its conductivity with a conductivity meter (see 4.3). Calculate the increase in conductivity as the test result. 5.3.2 Samples with a cross-sectional width or diameter of less than 15 mm and a length of more than 40 mm. Perform the test according to the method described in 5.3.1. Place the sample (see 5.1) in a round-bottom flask that has been filled with water to 100 mL of scale. cup (see 4.2). To prevent excessive evaporation and loss of water during the measurement process, a cooling water cover can be used. If necessary, more water can be added (see Chapter 3) to replenish the evaporated water.
6 Test report
The test report should at least include the following: a) Reference to this standard, b) Test sample name or number: c) Total surface area of ​​the test sample, cm\, d) Name or model of the instrument used; e) Abnormal phenomena observed during the measurement:
Any explanation different from this method:
Name) Test results and expression method!
h) Test period; i) Name of the operator and test laboratory:
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